Reincarnated as a goblin, but the mother is a white-haired elf?

Ye Yan, an orphan without a father or mother, was chosen by the assassination organization.
He became a killing machine with no emotions, only knew how to kill, and obeyed the orders of "Mom".
He was the chief of the assassination association.
Then, because of fear of Ye Yan's talent, he was plotted against by "Mom".
Unexpectedly, he was reincarnated into a different world and became a child of an elf, but there was something wrong with the place...
Looking at the goblin cubs rushing towards their mother.
Ye Yan did not hesitate and killed the other monsters approaching the elf.
Then, looking at the red-eyed white-haired elf loli in front of him, he asked:
"Are you my mother?"
... So.
An assassin who had no extra emotions and only had his mother in his eyes.
A white-haired elf abandoned by his companions and caught by goblins.
"Met" in the goblin nest. ...